public void TryRetrieveState_ReturnsStateWhenItExists()
{
// Arrange
var applicationState = new PersistentComponentState(new Dictionary <string, byte[]>(), new List <Func <Task> >());
var existingState = new Dictionary <string, byte[]>
{
["MyState"] = JsonSerializer.SerializeToUtf8Bytes(new byte[] { 1, 2, 3, 4 })
};
// Act
applicationState.InitializeExistingState(existingState);
// Assert
Assert.True(applicationState.TryTakeFromJson <byte[]>("MyState", out var existing));
Assert.Equal(new byte[] { 1, 2, 3, 4 }, existing);
Assert.False(applicationState.TryTakeFromJson <byte[]>("MyState", out var gone));
}
public void TryRetrieveFromJson_NullValue()
{
// Arrange
var serialized = JsonSerializer.SerializeToUtf8Bytes <byte[]>(null);
var existingState = new Dictionary <string, byte[]>()
{
["MyState"] = serialized
};
var applicationState = new PersistentComponentState(new Dictionary <string, byte[]>(), new List <Func <Task> >());
applicationState.InitializeExistingState(existingState);
// Act
Assert.True(applicationState.TryTakeFromJson <byte[]>("MyState", out var stored));
// Assert
Assert.Null(stored);
Assert.False(applicationState.TryTakeFromJson <byte[]>("MyState", out _));
}
public void TryRetrieveFromJson_DeserializesTheDataFromJson()
{
// Arrange
var myState = new byte[] { 1, 2, 3, 4 };
var serialized = JsonSerializer.SerializeToUtf8Bytes(myState);
var existingState = new Dictionary <string, byte[]>()
{
["MyState"] = serialized
};
var applicationState = new PersistentComponentState(new Dictionary <string, byte[]>(), new List <Func <Task> >());
applicationState.InitializeExistingState(existingState);
// Act
Assert.True(applicationState.TryTakeFromJson <byte[]>("MyState", out var stored));
// Assert
Assert.Equal(myState, stored);
Assert.False(applicationState.TryTakeFromJson <byte[]>("MyState", out _));
}
public async Task <T?> GetValue <T>(string key, Func <Task <T?> > factory)
{
if (_applicationState.TryTakeFromJson(key, out T? value))
{
return(value);
}
var result = await factory();
Persist(key, result);
return(result);
}
